医用脱脂棉纱布应用于烧伤创面的缺点是（） A.价格低廉、制作工艺相对简单 B.有较强

腐蚀性食管炎病变较重者的X线表现中，应除外（）

A.可侵及全部食管

B.早期食管明显痉挛与不规则收缩

C.食管边缘呈锯齿状与串珠状

D.食管粘膜正常或增粗扭曲

E.狭窄段常起于主动脉弓下方，呈向心性

阅读理解。

     Housing price in China has always caused heated discussions among property (房产) developers and

ordinary Chinese. To many property developers and local government officials, housing price in China is

still low compared with many developed countries. However, the average housing price in the United States

is only 8,000 yuan per square meter, while in China, it is even higher than in the United States. This shows

that there are some bubbles(泡沫) in Chinese real estate market, the International Finance News reported.

     Although the average price of residential houses in the United States, after converted to Renminbi, is

about 8,000 yuan per square meter, the houses in US are not sold in terms of building area, as most Chinese

property developers do when they sell their houses. If US property developers sell their houses according to

the building area, then the housing price will be even lower than 8,000 yuan per square meter. In most big

Chinese cities, such as Beijing, Shanghai, and Shenzhen, houses are sold at a price even higher than those in

the US.

     The high housing sales price in large cities in China proves that Chinese real estate market does have some

bubbles. Moreover, Chinese houses can not be compared with houses in US in terms of building quality,

environment and supporting facilities. Furthermore, it should be noted that American people's average income

is several dozen times higher than that of Chinese people. How can the Chinese afford to buy a house which

is even more expensive than that sold in US?

     At the beginning of 2007, Chinese government issued a set of policies that aimed to benefit the public. Now

in order to reduce the high housing prices, the government can regulate (控制) the real estate market by

raising tax on property industry and controlling the release of loans and lands to property developers. At the

same time, the government should allow people to build more houses through various fund-raising channels,

such as funds collected from buyers or raised by working units. By applying these multiple means, it is

expected that the high housing prices can be lowered.

1. What is the average housing price per square meter in China?

A. 8000 yuan

B. 10000 yuan

C. 7000 yuan

D. It's not mentioned here

2. Which of the following does NOT support the idea that the average housing price in China is even higher

    than in the United States?

A. Chinese houses can not be compared with houses in US in terms of building quality, environment and

     supporting facilities.

B. American people's average income is several dozen times higher than that of Chinese people.

C. The houses in US are not sold in terms of building area, as most Chinese property developers do when they

     sell their houses.

D. There are more people who need houses in China is larger than that in the United States.

3. How many measures are mentioned in the last paragraph in order to reduce the high housing prices?

A. Four

B. Three

C. Two

D. One

4. What is the main idea of this passage?

A. The housing price in China is so high that the government should do something useful to prevent it.

B. There are some bubbles in Chinese real estate market.

C. The average housing price in China is even higher than in the United States.

D. Chinese government issued a set of policies that aimed to benefit the public.

如图所示，半径为R的光滑圆柱体被固定在水平平台上，圆柱体中心离台边水平距离为0.5R，质量为m₁的小球用轻绳跨过圆柱与小球m₂相连，开始时将m₁控制住放在平台上，两边轻绳竖直。现在释放m₁，让m₁和m₂分别由静止开始运动，当m₁上升到圆柱体的最高点时，绳子突然断了，m₁恰能做平抛运动，重力加速度为g，求：

（1）m₁平抛时的速度v多大？

（2）m₂应为m₁的多少倍？

（3）m₁做平抛运动的过程中，恰能经过与台面等高的B点，求B点离台边的距离S_AB多大？

适用于漏斗棚架法施工的是()。

A．Ⅵ、Ⅶ围岩

B．Ⅱ、Ⅲ围岩

C．Ⅳ、Ⅴ围岩

D．Ⅴ、Ⅵ围岩

下列哪些征象预示休克发生的可能（）

A.体温过高或不升

B.烦躁不安而非神经系统感染

C.呼吸加快而X线摄片无异常

D.直立性低血压

E.不明原因的肝、肾功能损害